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 | Acesso ao texto completo restrito à biblioteca da Embrapa Trigo. Para informações adicionais entre em contato com cnpt.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
10/01/2010 |
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Data da última atualização: |
17/10/2012 |
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Autoria: |
EVERSMEYER, M. G.; KRAMER, C. L. |
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Afiliação: |
Merle G. Eversmeyer; Charles L. Kramer. |
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Título: |
Vertical concentrations of fungal spores above wheat fields. |
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Ano de publicação: |
1987 |
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Fonte/Imprenta: |
Grana, v. 26, n. 1, p. 97-102, 1987. |
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Idioma: |
Inglês |
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Notas: |
DOI: 10.1080/00173138709428909 |
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Conteúdo: |
Kramer-Collins volumetric spore samplers were used to measure concentrations of Puccinia graminis, P. recondita, Erysiphe graminis, Cladosporium, and Alternaria spores and fungal hyphal fragments within the canopy and at 1, 3, 6 and 14 m above ground level over wheat fields near Manhattan, Kansas, USA. The largest numbers of spores of each of the named fungi and hyphal fragments were trapped during hours when free moisture was not present on host leaf surfaces. As wind velocity increased, the number of spores and hyphal fragments trapped at all heights increased. Airspora trapped at the various sampling heights under all combinations of biometeorological conditions were calculated as ratios. Location and severity of infection or frequency of occurrence of the parent fungi greatly affected the percentage of propagules released in the canopy and escaped into the atmosphere. Less than 40% of P. recondita urediniospores released from tillering plants in the fall and trapped at 20–25 cm were trapped at 1 m, while only 6% of those trapped at 10 cm were trapped at 1 m. Ratios for the average number of spores trapped at 3 m: 1 m during the entire sampling period were similar for P. recondita (0.54), Alternaria (0.57), and E. graminis (0.48). However, the higher ratios that occurred with spores of P. graminis (0.72) and Cladosporium (0.76), and hyphal fragments (0.77) indicate considerable mixing of locally released airspora with airspora from exogenous sources. |
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Palavras-Chave: |
Medição a campo. |
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Thesagro: |
Fungo; Trigo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01958naa a2200181 a 4500
001 1836098
005 2012-10-17
008 1987 bl --- 0-- u #d
100 1 $aEVERSMEYER, M. G.
245 $aVertical concentrations of fungal spores above wheat fields.
260 $c1987
500 $aDOI: 10.1080/00173138709428909
520 $aKramer-Collins volumetric spore samplers were used to measure concentrations of Puccinia graminis, P. recondita, Erysiphe graminis, Cladosporium, and Alternaria spores and fungal hyphal fragments within the canopy and at 1, 3, 6 and 14 m above ground level over wheat fields near Manhattan, Kansas, USA. The largest numbers of spores of each of the named fungi and hyphal fragments were trapped during hours when free moisture was not present on host leaf surfaces. As wind velocity increased, the number of spores and hyphal fragments trapped at all heights increased. Airspora trapped at the various sampling heights under all combinations of biometeorological conditions were calculated as ratios. Location and severity of infection or frequency of occurrence of the parent fungi greatly affected the percentage of propagules released in the canopy and escaped into the atmosphere. Less than 40% of P. recondita urediniospores released from tillering plants in the fall and trapped at 20–25 cm were trapped at 1 m, while only 6% of those trapped at 10 cm were trapped at 1 m. Ratios for the average number of spores trapped at 3 m: 1 m during the entire sampling period were similar for P. recondita (0.54), Alternaria (0.57), and E. graminis (0.48). However, the higher ratios that occurred with spores of P. graminis (0.72) and Cladosporium (0.76), and hyphal fragments (0.77) indicate considerable mixing of locally released airspora with airspora from exogenous sources.
650 $aFungo
650 $aTrigo
653 $aMedição a campo
700 1 $aKRAMER, C. L.
773 $tGrana$gv. 26, n. 1, p. 97-102, 1987.
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Embrapa Trigo (CNPT) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
30/07/2013 |
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Data da última atualização: |
30/07/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
WELKE, J. E.; MANFROI, V.; ZANUS, M.; LAZZAROTTO, M.; ZINI, C. A. |
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Afiliação: |
JULIANE ELISA WELKE, UFRGS; VITOR MANFROI, UFRGS; MAURO CELSO ZANUS, CNPUV; MARCELO LAZZAROTTO, CNPF; CLÁUDIA ALCARAZ ZINI, UFRGS. |
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Título: |
Differentiation of wines according to grape variety using multivariate analysis of comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometric detection data. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Food Chemistry, n. 141, p. 3897-3905, 2013. |
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Idioma: |
Inglês |
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Conteúdo: |
Headspace solid-phase microextraction (HS-SPME) combined with comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry detection (GCÂGC/TOFMS) was used to analyse the volatiles in five types of wines elaborated with grapes of Cabernet Sauvignon, Merlot, Chardonnay, Sauvignon Blanc and Pinot Noir varieties. Fisher ratio, principal component analysis (PCA) and stepwise linear discriminant analysis (SLDA) were used to develop a discriminant model and, as a result, 12 volatile compounds enabled differentiation and classification of wines according to grape cultivars. A detailed examination of GCÂGC/TOFMS data showed that the use of one-dimensional gas chromatography with a mass spectrometric detector (1D-GC/MS) would probably result in misidentification of some of these 12 compounds, as they showed partial coelution with other components in the first chromatographic dimension. |
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Palavras-Chave: |
Brasil; Composto volátil; Espectofotometria; Fisher ratio; PCA; Rio grande do sul; Serra gaúcha; Volatie compound; Wine. |
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Thesagro: |
Cromatografia Gasosa; Vinho. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01822naa a2200301 a 4500
001 1963021
005 2013-07-30
008 2013 bl uuuu u00u1 u #d
100 1 $aWELKE, J. E.
245 $aDifferentiation of wines according to grape variety using multivariate analysis of comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometric detection data.$h[electronic resource]
260 $c2013
520 $aHeadspace solid-phase microextraction (HS-SPME) combined with comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry detection (GCÂGC/TOFMS) was used to analyse the volatiles in five types of wines elaborated with grapes of Cabernet Sauvignon, Merlot, Chardonnay, Sauvignon Blanc and Pinot Noir varieties. Fisher ratio, principal component analysis (PCA) and stepwise linear discriminant analysis (SLDA) were used to develop a discriminant model and, as a result, 12 volatile compounds enabled differentiation and classification of wines according to grape cultivars. A detailed examination of GCÂGC/TOFMS data showed that the use of one-dimensional gas chromatography with a mass spectrometric detector (1D-GC/MS) would probably result in misidentification of some of these 12 compounds, as they showed partial coelution with other components in the first chromatographic dimension.
650 $aCromatografia Gasosa
650 $aVinho
653 $aBrasil
653 $aComposto volátil
653 $aEspectofotometria
653 $aFisher ratio
653 $aPCA
653 $aRio grande do sul
653 $aSerra gaúcha
653 $aVolatie compound
653 $aWine
700 1 $aMANFROI, V.
700 1 $aZANUS, M.
700 1 $aLAZZAROTTO, M.
700 1 $aZINI, C. A.
773 $tFood Chemistry$gn. 141, p. 3897-3905, 2013.
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